Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e730fe854456ef0…

MALICIOUS

PDF

69.2 KB Created: 2021-09-28 08:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 840a541fb7465edd33d996827d196889 SHA-1: c763428fab626c63582234b6f94db386bb2ee06d SHA-256: 7e730fe854456ef022514c1da77770b29e69ac6473e829c3ff70e09321f6cfb9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which are structured as link farms or redirectors, suggesting an attempt to obscure the final malicious destination. The presence of a URL with 'utm_term=download+youtube+videos+in+mp3+android' indicates a lure for potentially unwanted or malicious software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://krassimirtaskov.com/userfiles/files/62528739438.pdf In PDF document text
    • http://vitacanes.com/uploads/files/32854580107.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/dimemerate.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed63106803---85505921715.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/73909824458.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/5895363611.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/zefozokotototuduwupapuv.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/62755009342.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/pafuxakefogiloxexubexa.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/57773622335.pdfIn PDF document text
    • https://buka.ru/sadm_files/bepede.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/zasizu.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/31431084842.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16140e5ed6398f---79206472686.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/birulunu.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/17817637155.pdfIn PDF document text
    • http://manchetenewsms.com.br/ckfinder/userfiles/files/tapataxivekamesinaxu.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/jobetabuwijuxuvipedugezut.pdfIn PDF document text
    • https://beaszemin.com/files/51216501607.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/83977739776.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/86725268684.pdfIn PDF document text
    • http://denizyemek.com/images/fck_upload/file/xuvebasewagodujomi.pdfIn PDF document text
    • http://jhdljz.com/userfiles/file/1632168056.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/49542469524.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=download+youtube+videos+in+mp3+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE62 14860 bytes
SHA-256: e2130b375043c55f22cf293b9a999dfe03051f99e338aa17e91df59997200758
font_01_sfnt_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6B 11232 bytes
SHA-256: 10dc40127071926d8dad53cd96b1cfdc64f066cee55777ae859bc16a7bb9d5a5